JPH10139629A - Powder composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To clarify an optical theory for expressing the texture of skin and beautifully showing the skin, and provide a powder composition capable of giving the texture of the skin on the basis of the theory. SOLUTION: This powder composition is prepared so that the maximum value of [(the reflectivity of reflected light to irradiated light at an incident angle of 40 degree)-(the reflectivity of reflected light to irradiated light at an incident angle of 85 degree)-(the reflectivity of reflected light to irradiated light at an incident angle of 85 degree)] is 3-8 in a measured wavelength range, when visible light in a wavelength range of 400-700nm is irradiated on the smooth surface of a sample uniformly filled with the powder composition at incident angle of 40 and degrees.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder composition suitable for decoration such as make-up, which is excellent in reproducing the texture of human skin.

[0002]

2. Description of the Related Art It is already known that a design such as a color or clothes looks very different in an impression such as beauty depending on the shape and texture of an object to be decorated. For example, clothes that look beautiful when worn by top-class models,
That is why it is not so attractive when worn by ordinary women. This is also why the color rendering, merits, and drawbacks of the clothes worn on the mannequins of the clothing exhibition cannot be understood simply by looking at the clothes. This is even the case with a mannequin having a three-dimensional structure, so it is even more so in a plane photograph. There are many complaints about the difference between the photograph and the real thing in catalog sales.

[0003] As described above, one of the major factors that cause the impression of beauty to differ depending on the object to be decorated is that the texture of the skin of a person who is the object is significantly different between a mannequin or a planar photograph and an actual person. . Therefore, it is required to reproduce the texture of the actual human skin, but it is not easy to artificially create a decoration (makeup) having the texture of the human skin.

[0004] Various efforts have been made so far to reproduce the texture of human skin. For example, 3D in which the right and left eyes are displaced by using polarized light to view images.
Images and holograms have been tried. However, these are attempts only from a two-dimensional viewpoint. Although there is a demand for a technique for providing a decoration having a three-dimensional texture of the skin, it has not yet been obtained yet.

[0005] On the other hand, in the field of cosmetics, makeup such as thickening the entire face, such as a Kabuki shade, has prevailed, but in recent years, the beauty due to the subtle texture has been reconsidered. As a makeup technique for expressing such a texture, for example, the above-described defocus makeup and the like have been developed. However, these technologies have remarkably improved in texture, but have problems in terms of covering power and the like. That is, the development of a makeup cosmetic having excellent skin coverage while having a good skin texture has been awaited.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of such a situation, and clarifies an optical theory in which the texture of the skin appears, and provides a powder composition having the texture of the skin. The task is to provide.

[0007]

In view of such circumstances, the present inventors have conducted intensive studies to elucidate the optical mechanism that makes human skin look beautiful. As a result, the texture of human skin appears. Found that one of the major factors that looks beautiful is the optical effect derived from the translucency of the stratum corneum.

Since the stratum corneum is translucent, almost all visible light incident on the skin at a steep angle close to 90 degrees is reflected, but visible light incident at a shallow angle close to 0 degrees is absorbed or scattered. The reflected light will be reflected at a different wavelength configuration from the irradiation light, and the subtle differences in the spectrum of the reflected light will give skin texture as a factor other than physical characteristics such as color and hiding power and look beautiful. To make a significant contribution to

The following MAX-R is used as an optical characteristic value expressing the difference in the spectrum of the reflected light.
It has been found that the AO value is suitably used.

[0010] That is, the powder composition of the present invention has a wavelength range of 4 on a smooth surface uniformly filled with the powder composition.
Visible light of 00 to 700 nm is applied to the surface at an incident angle of 4
The MA calculated from the reflectance in the wavelength range of the spectrum of two reflected lights obtained from the irradiation light when irradiated from the directions of 0 degree and 85 degrees is calculated by the following formula (I).
The X-RAO value is 3-8.

[0011]

MAX-RAO = [(BA) / A] _max (I)

(Where A represents an incident angle of 85 with respect to the surface)
Represents the reflectivity of the reflected light with respect to the irradiation light of a degree, and B represents the reflectance of the reflected light with respect to the irradiation light having an incident angle of 40 degrees with respect to the surface. [( _BA ) / A] _max represents the maximum value of ( _BA ) / A in the above wavelength range. )

According to the present invention, the optical property value is set to 4 on a smooth surface uniformly filled with the powder composition.
The maximum value (MAX-RA) in the measurement wavelength range of the value obtained by dividing the difference in the intensity of the spectrum of the reflected light obtained by irradiating the visible light at 0 ° and 85 ° with the intensity having the larger incident angle at that time.
The powder composition having an O value of 3 to 8 was found to be excellent in skin texture and completed.

The powder composition preferably contains an inorganic powder selected from the group consisting of silica gel, celite, talc, and sericite. In the present invention, the powder composition is preferably a cosmetic or a paint.

[0015]

Embodiments of the present invention will be described below. When the powder composition according to the present invention is processed into a uniform plane, the MAX-RAO value of the plane is within a specific range, and is suitable for cosmetics or paints.

Specifically, the powder composition according to the present invention comprises:
When a smooth surface uniformly filled with the powder composition is irradiated with visible light in a wavelength range of 400 to 700 nm from directions of incidence angles of 40 degrees and 85 degrees with respect to the surface, the light is obtained from the irradiation light. At each wavelength calculated from the reflectances of the two reflected lights, [(reflectance of reflected light with respect to irradiation light at an incident angle of 40 degrees with respect to the surface)-(reflection of reflected light with respect to irradiation light with an incident angle of 85 degrees with respect to the surface) MAX), which is the maximum value in the measurement wavelength range, of the ratio
The RAO value is used as an index, and the value is 3 to 8.

The measurement of the MAX-RAO value is most preferably performed according to the following steps.

1) The powder composition uniformly arranged on a flat surface is irradiated with visible light at 40 degrees to the flat surface of the powder composition, and the spectral spectrum of the obtained reflected light is measured. 2) Visible light is irradiated on the same plane at 85 degrees, and the spectrum of reflected light is measured in the same manner.

3) The difference between the two spectral spectra thus obtained at each wavelength is calculated, and the value obtained by the above equation (I) is used as the MAX-RAO value. This MAX-R
The AO value is an index representing the texture of the skin. This is because the reflected light of the incident light which is close to the vertical direction is almost a direct reflection, and the reflected light of the incident light which is close to the horizontal direction is scattered and absorbed most, thereby significantly different from the incident light. This is because the optical characteristics of the reflection surface can be grasped by comparing.

FIGS. 1 to 3 show the spectrum of reflected light when the skin is irradiated with light of various wavelengths at incident angles of 40 ° and 85 ° and measured. FIG. 1 shows normal skin (untreated skin of panelists determined to be beautiful skin by visual observation),
FIG. 2 shows a spectral spectrum when a foundation (mat type foundation) that gives a thick feeling to the panelist is applied, and FIG. 3 shows a spectral spectrum when the skin color standard plate is used. In the drawing, the dotted line indicates the case where the incident angle is 85 degrees, and the solid line indicates the case where the incident angle is 40 degrees.

FIGS. 1 to 3 show that the difference in the spectral pattern when the foundation is applied is an intermediate type between the difference in the spectral pattern in the case of bare skin and that of the standard skin color plate. Therefore, it can be seen that the closer the difference between the spectral patterns to the difference between the spectral patterns of the bare skin, the more the finished skin feels, and the closer it is to that of the standard skin color plate, the more matte the finish. Therefore, by comparing the obtained spectral spectra of the two reflected lights, it is possible to evaluate the extent to which the makeup looks natural and beautiful.

For the comparison of the spectral patterns of the reflected light with respect to the visible light in these two directions, it is appropriate to use the integrated value of the difference in the spectral luminous intensity (spectral reflectance) in the measurement wavelength range. As shown in FIG. 5, there is an excellent linear regression between the -RAO value and -RAO value.
X-RAO values can be used. FIG.
Is an incident angle of 4 for 20 randomly selected panelists.
The difference between the reflectances in the measurement wavelength range of 400 to 700 nm represented by the following formula (II) calculated using the reflectance of the spectral spectrum of each reflected light when the visible light is irradiated at 0 degree and 85 degrees. It is a plot of the integrated value and the MAX-RAO value calculated from the above formula (I) using the same reflectance.

[0023]

(Equation 3)

(In the formula (II), A represents the reflectance of reflected light with respect to visible light at an incident angle of 85 degrees, and B represents the reflectance of reflected light with respect to visible light at an incident angle of 40 degrees.)

Also, the beauty of the skin and M
The relationship with the AX-RAO value is, as shown in FIG.
When the RAO value is 3 to 5, it is determined that there is a beautiful bare skin feeling regardless of race. Here, the beauty of the bare skin is evaluated by five specialized panelists with a score of 5 for "very beautiful" and a score of 0 for "not very beautiful", and the average score is a representative value. When judging the beauty of the bare skin, skin texture, fineness, skin clarity, skin luster, surface smoothness, skin firmness, and lack of color unevenness are mainly used as factors. I have.

In the powder composition according to the present invention, MAX
When the RAO value is 3 to 8, the powder composition can give a texture of skin to the surface to which the powder composition is applied. A preferred MAX-RAO value having a skin texture is 3 to 8,
More preferably, it is 3-7, and still more preferably 4-6.

MAX-RAO of the powder composition according to the present invention
The value can be adjusted to the above range by changing the mixing ratio of the powder components. At this time, this adjustment is facilitated by adding a large amount of a powder having a high MAX-RAO value itself, such as silica gel or silica-iron oxide-coated titania sericite. Also, MA
If a composition having a high X-RAO value is prepared, adjustment can be facilitated by interpolation calculation with a normal formulation.

The powder that can be used in the powder composition of the present invention can be used without any particular limitation as long as it is used in cosmetics or paints. For example, silica gel, talc, Sericite, bentonite, mica, titanium mica, acrylic resin globules, titanium oxide,
Iron oxide, ultramarine, navy blue, carbon black, zinc oxide, chromium oxide, chromium hydroxide, alumina, calcium silicate,
Examples thereof include calcium carbonate. Of course, these powders
The surface can be surface-treated with silicone, metal soap, or the like.

In the present invention, the powder composition preferably contains an inorganic powder selected from the group consisting of silica gel, celite, talc, and sericite. The powder composition of the present invention is suitable as a cosmetic or a paint. When used in such an application, any component usually used in these preparations can be used in the composition of the present invention.

Examples of such optional components include, in cosmetics, hydrocarbons such as petrolatum and microcrystalline wax; esters such as jojoba oil and gay wax; triglycerides such as tallow and olive oil;
Cetanol, higher alcohols such as oleyl alcohol, stearic acid, fatty acids such as oleic acid, polyhydric alcohols such as glycerin and 1,3-butanediol, nonionic surfactants, anionic surfactants, cationic surfactants, Amphoteric surfactants, ethanol, thickeners such as carbopol, preservatives, ultraviolet absorbers, antioxidants, pigments, powders and the like can be exemplified, as coatings, film forming agents, binders,
Dispersants, plasticizers, rust inhibitors, solvents and the like can be exemplified.

The powder composition of the present invention is most preferably used for cosmetics, especially for makeup cosmetics.

[0032]

The present invention will be described in more detail with reference to the following examples, but it goes without saying that the present invention is not limited to these examples.

[0033]

Example 1 A foundation was prepared according to the following formulation. That is, the component (A) is weighed into a Henschel mixer and stirred well while rotating at a low speed.
crushed by a pulverizer equipped with a round hole screen of m, returned to a Henschel mixer, and the component (B) was dropped and coated while stirring at a low speed, and then uniformly mixed at a high speed. The powder was pulverized with a pulverizer equipped with a bone screen, packed in a gold plate, and pressed to obtain a foundation.

With respect to the surface of the pressed product, M
The measured AX-RAO value was 3.8. Thus, it can be seen that the MAX-RAO value can be adjusted to 3 to 6 only by using a combination of conventional materials without using any special materials. It can also be seen that this value can be increased by adding silica-iron oxide coated titania mica to some extent.

[0035]

[Table 1]

[0036]

Example 2 A foundation was prepared according to the following recipe. That is, the component (A) is weighed into a Henschel mixer and stirred well while rotating at a low speed.
crushed by a pulverizer equipped with a round hole screen of m, returned to a Henschel mixer, and the component (B) was dropped and coated while stirring at a low speed, and then uniformly mixed at a high speed. The powder was pulverized with a pulverizer equipped with a bone screen, packed in a gold plate, and pressed to obtain a foundation.

With respect to the surface of the pressed product, M
The measured AX-RAO value was 4.1. Thus, it can be seen that the MAX-RAO value can be adjusted to 3 to 6 only by using a combination of conventional materials without using any special materials. It can also be seen that this value can be increased by adding silica-iron oxide coated titania mica to some extent.

[0038]

[Table 2]

[0039]

Example 3 A foundation was prepared according to the following recipe. That is, the component (A) is weighed into a Henschel mixer and stirred well while rotating at a low speed.
The mixture was ground with a pulverizer equipped with a round hole screen of m, returned to a Henschel mixer, and the component (B) was dropped and coated while stirring at a low speed, and then uniformly mixed at a high speed. The powder was pulverized with a pulverizer equipped with a bone screen, filled in a gold plate, and pressed to obtain a foundation.

With respect to the surface of the pressed product, M
The measured AX-RAO value was 3.1. Thus, it can be seen that the MAX-RAO value can be adjusted to 3 to 6 only by using a combination of conventional materials without using any special materials. It can also be seen that this value can be increased by adding silica-iron oxide coated titania mica to some extent.

[0041]

[Table 3]

[0042]

Example 4 A foundation was prepared according to the following prescription. That is, the component (A) is weighed into a Henschel mixer and stirred well while rotating at a low speed.
crushed by a pulverizer equipped with a round hole screen of m, returned to a Henschel mixer, and the component (B) was dropped and coated while stirring at a low speed, and then uniformly mixed at a high speed. The powder was pulverized with a pulverizer equipped with a bone screen, packed in a gold plate and pressed to obtain a foundation. When the MAX-RAO value of the surface of this pressed product was measured, it was 3.3.

Thus, without using special raw materials,
MAX-RAO value is 3 ~ only with the combination of conventional raw materials
It can be seen that it can be adjusted to 6. It can also be seen that this value can be increased by adding silica-iron oxide coated titania mica to some extent. Furthermore,
It can be seen that such an effect is due to the addition of silica gel.

[0044]

[Table 4]

[0045]

Reference Example A conventional foundation was prepared according to the following formulation. That is, the component (A) was weighed into a Henschel mixer and stirred well while rotating at a low speed.
After pulverized by a pulverizer equipped with a 7 mm round hole screen and returned to a Henschel mixer, the component (B) was dropped and coated while stirring at a low speed, and then uniformly mixed at a high speed. The powder was pulverized with a pulverizer equipped with a bone screen, packed in a gold plate and pressed to obtain a foundation.

With respect to the surface of this pressed product, M
The measured AX-RAO value was 2.7. In this way, the foundation conventionally used is MAX-
It can be seen that the RAO value is low.

[0047]

[Table 5]

[0048]

Example 5 <Evaluation Test> A model was made up using the foundations of Examples 1 to 4 and the foundation of the reference example, and the cosmetics were made by five beauty experts according to the following criteria. I was evaluated. The results are shown in Table 1 as average scores. From this result, it is understood that when the MAX-RAO value exceeds 3, the effect of concealing a trouble or the like is high and a natural finish can be obtained. Furthermore, MAX-
It can be seen that those having an RAO value exceeding 4 have a remarkable cosmetic effect.

(Questions and their scoring criteria) (1) Can troubles be hidden? 5 points: good concealment, 4 points: good concealment, 3 points
Points: Can be concealed, 2 Points: Have some problem in concealing,
1 point: There is a problem in hiding, 0 point: No hiding is possible.

(2) Does the finish look natural? 5 points: looks very natural, 4 points: proportion looks natural, 3 points
Points: Looks natural, 2 points: Looks slightly unnatural, 1 point:
Appears quite unnatural, 0 point: looks unnatural.

(3) Is the finish beautiful? 5 points: very clean, 4 points: sufficiently clean, 3 points: clean, 2 points: slightly problematic, 1 point: problematic, 0 point: out of the question.

[0052]

[Table 6]

[0053]

Example 6 A powder composition was prepared according to the following formulation.
That is, the ingredients are mixed with a Henschel mixer,
The powder composition was obtained by pulverizing with a pulverizer equipped with an m round hole screen. MAX-RAO value was 4.3.
When this was attached to the surface of the mannequin doll with an adhesive, it looked like a human. This indicates that the powder composition of the present invention is also useful as a paint.

[0054]

[Table 7]

[0055]

According to the present invention, it is possible to clarify the optical theory that makes skin texture appear and look beautiful, and to provide a powder composition that gives skin texture.

[Brief description of the drawings]

FIG. 1 is a diagram showing a spectral spectrum of reflected light when untreated skin is irradiated with visible light at incident angles of 85 ° and 40 °.

FIG. 2 is a diagram showing a spectral spectrum of reflected light when visible light is irradiated at incidence angles of 85 ° and 40 ° to skin made up with a matte foundation.

FIG. 3 is a diagram showing a spectral spectrum of reflected light when a skin color standard plate is irradiated with visible light at incident angles of 85 ° and 40 °.

FIG. 4 is a diagram illustrating a relationship between beauty of bare skin and a MAX-RAO value.

FIG. 5 is a diagram showing a relationship between an integrated value of a difference between spectrophotometers and a MAX-RAO value.

Claims (3)

[Claims] 1. A powder composition having a wavelength range of 400 to 70 on a smooth surface uniformly filled with the powder composition.
0 nm visible light at an incident angle of 40 degrees and 8
When irradiated from the direction of 5 degrees, MAX-RAO is calculated from the reflectance in the wavelength range of the spectrum of two reflected lights obtained from the irradiated light according to the following formula (I).
A powder composition having a value of 3 to 8. MAX-RAO = [(BA) / A] _max (II) (where A represents the reflectance of reflected light with respect to the irradiation light having an incident angle of 85 degrees with respect to the surface, B represents the reflectance of the reflected light with respect to the irradiation light having an incident angle of 40 degrees with respect to the surface.
[( _BA ) / A] _max is (B-A) in the above wavelength range.
A) represents the maximum value of / A. ) 2. The powder composition according to claim 1, wherein the powder composition contains an inorganic powder selected from the group consisting of silica gel, celite, talc, and sericite. 3. The powder composition according to claim 1, which is a cosmetic or a paint.